Multi-component noble metal catalysts prepared by sequential deposition precipitation for low temperature decomposition of dioxin

摘要

To create a decomposition catalyst for the several pollutants with the necessary performance, we united noble metals of two and three different types by selective and successive deposition onto select mixed metal oxide supports. The catalytic oxidations of H_2, trimethylamine, o-chlorophenol and of dioxin derivatives over these multi-component noble metal catalysts were subsequently investigated. The ternary component catalyst, Au/Fe_2O_3-Pt/SnO_2-Ir/La_2O_3, showed greatly enahcned activity in the catalytic oxidation of o-chlorophenol and of dioxin at 423 K, indicating a catalytic activity enhancing (boosting) effect by the addition of the Ir/La_2O_3 catalyst that by itself shows low activity.